Treatment Plant Operator Exam Study Guide Answers

What is the sludge volume index (SVI) of the following aeration basin, given the following data: a settleometer reading of 860 mL after 5 minutes, 730 mL after 10 minutes, 650 mL after 15 minutes, and 420 mL after 30 minutes; an aeration basin mixed liquor suspended solids reading of of 2,100 mg/L; a return MLSS of 4,400 mg/L; an effluent TSS of 10 mg/L; and an influent TSS of 240 mg/L? The answer to this question is C, 200 mL/g. This can be solved using the SVI formula below. To solve this problem, you need take the 30-minute reading from your settleometer